Year	billion cubic meters
1992	20.2852
1993	21.3666285714
1994	22.4480571429
1995	23.5294857143
1996	24.6109142857
1997	25.6923428571
1998	26.7737714286
1999	27.8552
2000	28.9366285714
2001	30.0130821429
2002	31.0895357143
2003	32.1307142857
2004	33.2071428571
2005	34.2835714286
2006	35.36
2007	35.368
2008	35.368
2009	35.368
2010	35.368
2011	35.368
2012	35.368
2013	35.368
2014	35.368
2015	35.368
2016	35.368
2017	35.368
2018	35.368
2019	35.368
2020	35.368